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  1. Qt
  2. QTBUG-121643

qt6-declarative: possible build-time race condition around qmlcachegen

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Details

    • Linux/X11
    • 3b01f90fa (dev), 4920a7f76 (6.7), f34022486 (dev), 123068ed8 (6.6), ec543f184 (6.7), 0662300f7 (6.6), 985910708 (dev), b116d89a1 (6.7), 20aaab899 (6.6)

    Description

      While working on reproducible builds for openSUSE, I found that
      our qt6-virtualkeyboard and qt6-declarative packages vary between builds, unless both builds were done in VMs with the same number of cores.
       
      There is even a 10% difference in the size of the resulting /usr/lib64/qt6/qml/QtQuick/VirtualKeyboard/Components/libqtvkbcomponentsplugin.so
       
      The underlying issue is probably that there is a number of generated files such as qtvirtualkeyboard-everywhere-src-6.6.1/build/src/components/.rcc/qmlcache/qtvkbcomponentsplugin_SymbolModeKey_qml.cpp that vary in their

       extern const QQmlPrivate::AOTCompiledFunction aotBuiltFunctions[] = {
       
      entries. This file is generated by qmlcachegen, so there is likely some race happening around that generation.

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        Issue Links

          depends on

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-121734 SetLookup crashes on hierarchy of shadowable properties

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-115159 QmlCache cpp files are always generated differently

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          relates to

          Task - A task that needs to be done. QTBUG-102227 Remove implicit import of QtQuick.VirtualKeyboard.Components

          • Not Evaluated - Not yet evaluated/prioritized
          • Reported

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2655 Cannot run hello world QML application because Qt6QuickControls2Basic.dll is missing

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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              ulherman Ulf Hermann
              bmwiedemann Bernhard M. Wiedemann
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                Updated:
                Resolved: